What is porous asphalt and how does it work?

A short video about porous asphalt and the use of this material for the Alexander field improvements on the Punahou School Campus in Honolulu, HI. Credits: Photos and videos courtesy of Grace Pacific LLC, the Maryland Asphalt Association, Inc., the National Asphalt Pavement Association (NAPA), the Asphalt Pavement Alliance (APA), and the Hawaii Asphalt Paving Industry.